Improvement in hydraulic jacks



ll/z/zess l u I M. J. WALSH.

HYDRAULIC-JACK. No.1'70,419. Patented Nov. 23,1875.

/ Hull" ".PETERS, PHOTO-UTNUGRAFNER, WASHINGTON D C UNTTED STATESMAURICE J. WALSH,

PATENT OFFICE.

oF NEW YORK, N. v.

IMPROVEMENT INv HYDRAULIC JACKSI Specification forming part of LettersPatent No. 170,419, dated November 23, 1875; application tiled October6, 1875.

To all whom it may concern Be it known that I, MAURICE J. WALSH, of NewYork city, in the county and State of New York, have invented anImprovement in Hydraulic Jacks; and I do hereby declare that thefollowing 1s a full, clear, and exact description ot' the same.

This invention relates to that class of jacks known as hydraulicjacks;and it consists in the combination, with such a jack, of an e11- ginemounted directly thereon, and connected with shaft which operates thepump.

The jack may be of any suitable construction. The engine maybe driven bysteam, water, or air, and it is mounted directly upon the body of thejack, which thus serves as the supporting frame or standard oftheengine.

The accompanying drawing illustrates one mode ot' carrying out myinvention.

Figure l is a side view of a hydraulic jack of well-known construction,with an engine attached thereto. Fig. 2 is a central longitudinalsection taken in the line w 'x of Fig. 1. Fig. 3 is a transverse sectiontaken in the line y y ot' Fig. 2.

The jack is constructed with the reservoir A, pump-cylinder B, andpressure-cylinder C above the ram D, which is surrounded by and works inthe ram-cylinder E, said ram-cylinder being attached to the reservoir A.rIhe plunger F is operated by an arm, G, on a shaft, H, one end ot'which projects outside of the reservoirA. The jack is provided with avalve, c', for allowing the water to tlow from the reservoir A into thepump-cylinder B when the plunger is raised, and with a valve,

j, through which the piston, as it descends, forces the water into thepressure-cylinder G, where the pressure it exerts against the head ofthe ram causes the ram-cylinder E, and the parts carried thereby, to beraised or forced outward therefrom, so as to lift or exert a pressureupon any article with which the head K of the jack is brought incontact. By means of a screw-valve, n, communication is afforded betweenthe reservoir A and pressure-cylinder G, to provide for restoring theparts to the first position.

The construction ot' the engine, and the mode of transmitting its powerto the pump, may be of any suitable description. It is here representedas a simple direct-acting engine, L, having the piston-rod M connectedwith a crank or arm, J, attached to the end of the shaft H, whichextends outside of the reservoir A. The engine is attached to theoutside of the reservoir, so as to move therewith. The crank or arm J isprovided, near its end, with a slot, s, in which works a pin, m,attached to the piston-rod M; and said pistonrod is also provided with across-head, l?, sliding in guides in a stationary frame, p, so that asthe piston-rod is reciprocated the crosshead prevents any lateralvibration or deviation thereof from a right line, While the engagementof the pin m and slot s enables the piston-rod to impart an oscillatingmotion to the crank or arm J, and thus, through the shaft H and arm G,to operate the pump of the jack.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination, with a hydraulic jack, ot' an engine mounteddirectly thereon, and connected vwith its pump, substantially as hereindescribed.

2.-The combination, with the pump-operating rock-shaft H and itsattached arm G, of the slotted crank or arm J, the pin m, and thepiston-rod M, substantially as herein described. l Y 3. The combination,with the piston-rod M and slotted arm J, ofthe sliding cross-head P andstationary guide-frame p, substantially as herein described.

MAURICE J. WALSH.

Witnesses MICHAEL RYAN, FRED. HAYNEs.

